Data also showed that the danger of failed pregnancy was 1.3 times higher for women with jobs as compared to those who do not work.

According to a team of researchers led by Kim Eun-Ah from the Korea Occupational Safety and Health Agency, the miscarriage rate for working women was 3.9 percentage points higher than those who did not have a job.

The data was based on 430,343 pregnancies and 340,088 births registered with the National Health Insurance Service in 2013.